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All Journal Reaktor Jurnal Serambi Engineering Legalitas: Jurnal Hukum
yunardi yunardi
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Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Energy Engineering Environmental Science Law, Crime, Criminology & Criminal Justice Materials Science & Nanotechnology

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Biological Treatment Of Simulated Humic Acid Wasre Water In A Laboratory Scale Aerobic Reactor yunardi yunardi
Reaktor Volume 07 No. 1 Juni 2003
Publisher : Dept. of Chemical Engineering, Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (2939.41 KB) | DOI: 10.14710/reaktor.7.1.33-36

Abstract

A laboratory study was  conducted to determine the feasibility of activated sludge reactor for treating humic acid waste waterand examine the effect of the presence of glucose as the second carbon source on treatment performance. Activated sludge obtained from a waste water treatment plant treating domestic wastewater was used as a seed for reactors. Synthetic wastewater containing humid acid as the sole carbon source and glucose as the second carbon source were used as feeds for the reactors operated in a fill-and-draw mode. The result showed  tht the presence of glucose in the wastewater enhanced the production of higher MLSS (mixed liquor suspended solids) than that without of glucose. The TOC (Total Organic Carbon) concentration in both reactors fluctuated greatly until the end of the experiment due to inability of keeping the input TOC at desired level. However the decrease in TOC suggested that there are some microorganisms capable of degrading the humic acid. Addition of glucose to the simulated humic acid wastewater improved the capability of microbes in degrading the acids. Most ammonium nitrogen in the wastewater was converted to nitrate nitrogen. Although the performance was lower compared to that of conventional system, activated sludge process was capable of degrading wastewater containing humic acids.Keywords : activated sludge, ammonium nitrogen, fill and draw, glucose, humic acid, wastewater
Identifikasi Senyawa Boraks pada Bakso secara Non Destruktif Menggunakan Spektrum Inframerah Dekat dan Principle Component Analisys Budiara Pahlawan; Yunardi Yunardi; Agus A Munawar; Friska Meirisa; Hesti Meilina Meilina
Jurnal Serambi Engineering Vol 5, No 4 (2020)
Publisher : Fakultas Teknik

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32672/jse.v5i4.2337

Abstract

The combination of Near Infrared (NIR) Spectroscopy and multivariate analysis using Principle Component Analysis (PCA) was developed to detect the presence of borax in meatballs. The conventional analysis used to detect the presence of borax has been considered inefficient because it is only able to qualify for the presence of borax, but cannot determine the dose of borax used. This study aimed to identify the presence of borax in meatballs using NIR Spectroscopy in the 1000-2500 nm range and maximize PCA performance by combining MSC and SNV pre-treatment with Savitzky Golay second derivative. The results showed that the identification of borax can occur at a wavelength of 1800 - 2500 nm, which is indicated by vibrations at a wavelength of 1865 nm with the atomic structure of C-Cl and the combination of pre-treatment of the second derivative of Savitzky Golay also successful for grouping the data to be better.
Studi Fermentasi Biji Kopi Menggunakan Enzim Proteolitik Imam Budiman; Farizky Wahyudi; Yunardi Yunardi; Hesti Meilina
Jurnal Serambi Engineering Vol 6, No 4 (2021): Oktober 2021
Publisher : Fakultas Teknik

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32672/jse.v6i4.3466

Abstract

Wet fermentation by added proteolytic enzyme can be used for upgrade the taste of coffee. The enzyme was obtained from plant because of ease to get and fulfill the term of Indonesia’s constitution about halal product assurance. This study used two types of proteolytic enzyme; bromelain and zingibain that originated from pineapple and ginger, respectively. Coffee beans were fermented with weight ratio 1:4 and 3:4 (enzyme’s source: coffee beans), and compared with a non-adding control and commercial coffee. Samples were collected after 1, 2 and 3 days. Roasted beans were physical and chemical evaluated according to Indonesia National Standard (SNI-01-3542-2004). Also, the sensorial evaluation of the roasted coffee beans was determined by organoleptic test. Physical and chemical evaluation consist of water content, ash content, coffee extract, ash alkalinity and caffeine content. Sensorial evaluation includes color, aroma and flavor.
TINJAUAN YURIDIS HAK ANAK DARI PERKAWINAN SIRI PASCA PUTUSAN MAHKAMAH KONSTITUSI NOMOR 46/PUU-VIII/2010 Ibrahim Ibrahim; Nurbaeti Nurbaeti; Yunardi Yunardi
Legalitas: Jurnal Hukum Vol 3, No 2 (2012): Desember
Publisher : Universitas Batanghari Jambi

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (245.292 KB) | DOI: 10.33087/legalitas.v3i2.135

Abstract

Putusan Mahkamah Konstitusi No.46/PUU-VIII/2010 tentang masalah anak di luar perkawinan yang telah di uji materil (judicial review) Pasal 43 ayat (1) undang-undang perkawinan, sehingga Tulisan ini mengkaji kekuatan hukum putusan  mahkamah konstitusi nomor 46/PUU-VIII/2010 terhadap hubungan  keperdataan antara  anak dari perkawinan  siri  dengan ayah  biologisnya dan  ruang lingkup hak keperdataan dalam kaitannya   dengan hubungan antara  anak dari  perkawinan siri   dengan  ayah  biologisnya  sebagaimana  putusan  Mahkamah Konstitusi  Nomor  46/PUU-VIII/2010Kata Kunci :      Hak Anak Dari Perkawinan, Pasca Putusan Mahkamah Konstitusi
Co-Authors Agus A Munawar Budiara Pahlawan Farizky Wahyudi Friska Meirisa Hesti Meilina Hesti Meilina Meilina Ibrahim Ibrahim Imam Budiman Nurbaeti Nurbaeti